chromium/third_party/blink/renderer/core/editing/commands/insert_paragraph_separator_command.cc

/*
 * Copyright (C) 2005, 2006 Apple Computer, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "third_party/blink/renderer/core/editing/commands/insert_paragraph_separator_command.h"

#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/dom/node_traversal.h"
#include "third_party/blink/renderer/core/dom/text.h"
#include "third_party/blink/renderer/core/editing/commands/delete_selection_options.h"
#include "third_party/blink/renderer/core/editing/commands/editing_commands_utilities.h"
#include "third_party/blink/renderer/core/editing/commands/insert_line_break_command.h"
#include "third_party/blink/renderer/core/editing/editing_style.h"
#include "third_party/blink/renderer/core/editing/editing_utilities.h"
#include "third_party/blink/renderer/core/editing/selection_template.h"
#include "third_party/blink/renderer/core/editing/visible_position.h"
#include "third_party/blink/renderer/core/editing/visible_selection.h"
#include "third_party/blink/renderer/core/editing/visible_units.h"
#include "third_party/blink/renderer/core/html/forms/html_form_element.h"
#include "third_party/blink/renderer/core/html/html_br_element.h"
#include "third_party/blink/renderer/core/html/html_element.h"
#include "third_party/blink/renderer/core/html/html_hr_element.h"
#include "third_party/blink/renderer/core/html/html_quote_element.h"
#include "third_party/blink/renderer/core/html_names.h"
#include "third_party/blink/renderer/core/layout/layout_object.h"
#include "third_party/blink/renderer/core/layout/layout_text.h"
#include "third_party/blink/renderer/core/mathml_names.h"
#include "third_party/blink/renderer/core/svg_names.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"

namespace blink {

namespace {

// 3.2.5.2.5 Phrasing content
// https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
bool IsPhrasingContent(const Node* node) { … }

bool IsEditableRootPhrasingContent(const Position& position) { … }

}  // namespace

// When inserting a new line, we want to avoid nesting empty divs if we can.
// Otherwise, when pasting, it's easy to have each new line be a div deeper than
// the previous. E.g., in the case below, we want to insert at ^ instead of |.
// <div>foo<div>bar</div>|</div>^
static Element* HighestVisuallyEquivalentDivBelowRoot(Element* start_block) { … }

static bool InSameBlock(const VisiblePosition& a, const VisiblePosition& b) { … }

InsertParagraphSeparatorCommand::InsertParagraphSeparatorCommand(
    Document& document,
    bool must_use_default_paragraph_element,
    bool paste_blockquote_into_unquoted_area)
    : … { … }

bool InsertParagraphSeparatorCommand::PreservesTypingStyle() const { … }

void InsertParagraphSeparatorCommand::CalculateStyleBeforeInsertion(
    const Position& pos) { … }

void InsertParagraphSeparatorCommand::ApplyStyleAfterInsertion(
    Element* original_enclosing_block,
    EditingState* editing_state) { … }

bool InsertParagraphSeparatorCommand::ShouldUseDefaultParagraphElement(
    Element* enclosing_block) const { … }

void InsertParagraphSeparatorCommand::GetAncestorsInsideBlock(
    const Node* insertion_node,
    Element* outer_block,
    HeapVector<Member<Element>>& ancestors) { … }

Element* InsertParagraphSeparatorCommand::CloneHierarchyUnderNewBlock(
    const HeapVector<Member<Element>>& ancestors,
    Element* block_to_insert,
    EditingState* editing_state) { … }

void InsertParagraphSeparatorCommand::DoApply(EditingState* editing_state) { … }

void InsertParagraphSeparatorCommand::Trace(Visitor* visitor) const { … }

}  // namespace blink